Research On Pile Hole Drilling Process Technology And Instruments In Complicated Stratum

Within the complex formation (the rock layer, gravel layer, easy to collapse shrinkage of the mud hole layer, sand layer) and the dry areas of Pile Construction is always plagued the field of Pile Construction of China's problems, related to the construction of process equipment and the formation Research and production drilling, also on behalf of a country pile in the field of development level of mechanical work. China's vast territory, large population, population, resources and uneven distribution, logistics and high demand, poor transport infrastructure, high-speed railways, highways, urban rail transit construction requires a lot of Pile Construction, many parts of the formation is composed of rocks, gravel, sand, silt, and so easy to collapse strata backfill composed of many areas there is no working water, therefore, complex formation and the water area of Pile Construction technology of the more urgent and necessary.This paper complex formation of Pile Construction of inefficient and difficult problem in construction of water areas, from technology and equipment on a systematic study made on the following aspects of the research results:1,Through the rock drill tool and the overall research experiments to solve a rotary Drilling in rock layers and the drill tool life when drilling costs, making the hole into the rock pile construction using a variety of hob with technical economic feasibility.2,Through the rock layer and gravel layer, floating rock drilling commonly adopted in the process of percussive drilling, drilling holes in large diameter pile used in the impact of reverse circulation rotary drilling technique to solve the Percussive Drilling reaming rate and large, serious waste of concrete, into the problem of low efficiency.3,No circulation drilling technology is our present and future Pile Construction of the main process area, no circulation drilling through the research process and apparatus to address the areas of our country Pile Construction of water and mud on the surrounding environment pollution, labor employees intensity of the problem, solve our region Pile Construction of water and rock in the layer, gravel, silt, sand layer pile hole drilling issue in the non-circulation drilling technology and equipment in the drilling efficiency in the complex formation the problem of low circulation drilling technique for no special work with casing drilling methods and supporting the use of special drilling problems.